Although the technology for processing expanded polypropylene (EPP) is comparatively new, the number of possible applications in the automotive industry is growing rapidly. The physical and chemical properties of polypropylene, as well as modern processing technologies, are giving rise to more and more concepts for using this material in vehicle design.
At the beginning of the invention of EPP plastic, there was a need to replace rigid polyurethane foam with another material, as the production process for this was very harmful to the environment and later problems arose during disposal. The first use of expanded polypropylene in vehicle production was in the 1980s, when a bumper component was produced from this material. Polypropylene was shown to have strong shock-absorbing properties and not to deform even after multiple impacts or. Is Destroyed. To this day, parts that serve the safety of occupants, such as headrests, car seats for children, and door filler material that absorbs the energy of a side impact, are made of this material. However, the long list of potential applications is not limited to just that. Other properties of expanded polypropylene include very high plasticity, excellent thermal insulation and low weight, which can reduce the overall weight of the vehicle. For this reason, ever more comprehensive. More complicated concepts created for the use of polypropylene in the automotive industry.
Use of expanded polypropylene and polystyrene – similarities and differences
Expanded polystyrene (EPS) is a very popular and widely known material in the automotive industry, and is also used in the design and manufacture of protective and transport packaging when good thermal insulation is required. Expanded polypropylene (EPP), on the other hand, is sometimes considered a raw material for more industrial niche applications. Externally, it resembles EPS because it is made in a foaming process like expanded polystyrene, but that's it for the similarities. The production technology for EPP is more complex. Polystyrene foaming usually involves heating granules with steam, increasing the volume more than fiftyfold. EPP production involves combining polypropylene resin with other chemicals and then foaming it up. These additives provide the excellent impact resistance of expanded polypropylene, as well as the ability to elastic recovery.